The scrollviewer doesn't allow mouse wheel scroll on MacOs + Firefox.
We have found that enabling the telerik attached property ScrollViewerExtensions.EnableMouseWheel and setting explicitely windowless=true on the silverlight object tag was enabling mousewheel scrolling
However, we can't seem to set this attached property at the Style level.
It also seems that the order at which we set the property on the scrollviewer matters. when setting the EnableMouseWheel before any other, we dont get any problem and scroll works, if we set it further down the list of properties of the scrollviewer (in xaml), the mousewheel won't work.